 In May 2000, the Commandant of the Marine Corps directed the re-designation of Marine Aviation Training Support Group NAS Pensacola as Marine Aviation Training Support Group 21.All Marine Aviation Training Support Groups were redesignated to promote a sense of Marine Corps identity and tradition and allow them and their history to live on.Hurricanes Ivan and Dennis nearly destroyed the historic [NAS Pensacola] including the buildings used to house MATSG-21.